Adjustable portable router



Aug. 7, 1928. 1,679,446-

O. A. POPHAM ADJUSTABLE PORTABIJ E RQUTER Filed June 6, i927 2 Shets-Sheqt 1 Aug. 7, 192a. 1,679,446 O. A. POPHAM I ADJUSTABLE PORTABLE ROUTER med June 6, 1927 2 Shgets-Sheet 2 Inwntor i Patented Aug. 7, 1928.

UNITED STATES PATENT OFFICE.

OTIS A. POPHAM, or HAYTI, lvrissoonr, Assrenon or onn-roun'rn 'ro MELVIN G. MGELVJRATH, or HAYYTI, MISSOURI.

ADJUSTABLE YORTAIBLE ROUTER.

Application filed June 6,

My invention relates to routing machines of a type adapted for cutting away h gh places or spots from printing plates which might smear or smudge during the process of printing from stereotypes, electrotypes, thin plate, base-high or typohigh plates, or for resurfacing the back of such plates and having adjusting means for use in connection with the very thinnest of shell plates to a slight degree more than type-high plates. I

A further object is to provide a machine of this character which may be removably placed in position on a regular printers table or other horizontal surface and having an electric motor operatively attached there to.

A further object is to provide means for locking the rotating spindle in adjusted position.

ther objects and advantages reside in the special construction, combination and arrangement of parts forming the invention as more fully hereinafter described and claimed reference being had to the accompanying drawings forming part hereof wherein Figure 1 is a side elevation view,

Figure 2 is a top plan view,

Figure is a front end view Figure 4 is a fragmentary vertical sectional view through the spindle mounting.

Referring to the drmving I have shown my invention comprising a base 5 adapted to be mounted on top of a printers saw table or other horizontal surface and upon end of which is arranged an angular support ing arm 6 secured to the base by bolts 7 or the like. A pin 8 is arranged in one side of the lower portion of the arm 6 upon which is pivotally mounted an angular motor supporting bracket 9;. the bracket extending downwardly over the end of the base and having its end formed into a horizontally arranged table 10 upon which the motor 11 is suitably secured.

The opposite end of the supporting arm 6 is elevated above the base 5 and secured in spaced relation therefrom and comprises 1927. Serial No. 196,842.

engaging the bushings whereby to retain the same in position therein. A spindle 14; is rotatably mounted within the bushings having its lower end provided with a chuclc 15 adapted to removab'ly carry a pin 16 or the like extending downwardly therefrom. Upon the spindle intermediate its ends and ar ranged between the arm of the forkedshaped end I provide a pulley wheel 17 secured on the spindle for rotation therewith by a screw 18 extending therethrough and engaging the slot 19 formed vertically in one face of the spindle. It will be OlJSGY'VGi'il that while the pulley is secured on the spindle for rotation therewith at the same time the spindle may be moved vertically with respect to the pulley by reason of the slot 19.

An annular groove 20 is formed in the upperend of the spindle and a similar groove 21 is arranged near the lower end thereof. Within these grooves is arranged the yoked ends 22 of a retaining plate 23, the intermediate portion of the plate 23 being vertically arranged in parallel relation with respect to the spindleand the ends 22 thereof being horizontally arranged and extend iug in a direction toward said spindle. The plate 23 is slidably arranged within guides 24 arranged at the outer edges of the elevated end of the supporting arm (5, one edge of said plate being provided with a rack 25 engaging a gear 26 carried on a shaft 27 having one end thereof rotatably retained in a bracket 28 secured to the end of the supporting arm and its outer end provided with an operating handle 29. Itis thus pparent that the retaining plate '23 may be moved vertically i reasons of the rack and gear ei'igagement and since the ends of the.

retaining plate engage the spindle 14 the same will also be moved therewith. Means for locking the retaining plate in adjusted position is provided, comprising a vertically arranged slot 30 formed in the plate within which is inserted a screw 31 extending from the end of the supporting arm and having a wing nut 82 by means of which the plate may be adjustably secured in position against the end of the supporting arm.

An endless belt may be provided for operating the pulley 17 and the spindle 14, the belt being arranged about a pair of pulleys rotatably mounted on. the rear end of the supporting arm' 6 and downwardly about a pulley .35 formed on one end of the shaft of the motor 11L A belt tightener device is provided comprising a screw 36 inserted through an opening within the angular bracket 9 and seated within the lower portion of the supporting arm (5. The angular bracket 9 being pivotal] y mounted n 1011 the pin 8 is adapted to be moved vertica ly and by securing the same in proper position by the screw 36 the proper tension may be placed upon the belt 33.

An opening 37 may be drilled in the base 5 in vertical alinenient with the pin 16 whereby to safeguard the pin from injury should the same pass entirely through the work.

From the foregoing explanation it is believed that the manner of operation of the device as well as the advantages derived through its use will become apparent.

It is obvious that the invention is susceptible to various changes and modifications without departing from the spirit thereof or the scope of the appended claim and I accordingly claim all such forms of the device to which I am entitled.

I claim:

A portable router comprising a spindle support having an elevated end, a rotatably carried vertically disposed spindle at the elevated end of said support and adapted to have a chuck secured at its lower end and formed with a pair of annular grooves adjacent each end thereof, and a vertically extending groove intermediate its ends, a pulley arranged on said spindle having a retaining screw inserted thercthrough with its inner end slidably carried in the vertical roove and securing the pulley and spindle tor rotating movement, a drive belt for the pulley, a U-shaped retaining plate adjustably secured on the elevated end of the support, with its ends disposed horizontally, and arranged in the grooves at the opposite ends of said spindle, a rack formed on one edge of the plate, a gear mounted on the support engagcahle with the rack whereby to vertically adjust the plate, and means connecting the plate with the support for securing the former in vertically adjusted position.

In testimony whereof I afiix my signature.

OTIS A. POPHAM. 

